[meteorite-list] impact melts

From: stan . <laser_maniac_at_meteoritecentral.com>
Date: Wed Apr 6 16:52:21 2005
Message-ID: <BAY101-F10115C39E13CE21B94FAECF03D0_at_phx.gbl>

what about the F chonderite inclusions in aubrites, specifically cumberland
falls - is that a xenolith of unrelated material, or is it unmelted
precursor material?

and dont forget chondrules in polymict ureilites! :)


>From: j.divelbiss_at_att.net
>To: "stan ." <laser_maniac_at_hotmail.com>,
>info_at_meteorites.com.au,fprochaska@verizon.net,
>meteorite-list_at_meteoritecentral.com
>Subject: Re: [meteorite-list] impact melts
>Date: Wed, 06 Apr 2005 20:21:57 +0000
>
>Stan and others,
>
>Acapulcoites, Brachinites, Lodranites, and Winonaites have been thought of
>as being "primitive" achondrites that may have chondrules, especially
>acapulcoites. I've always thought of these as being "tweeners" in between
>chondrites and achondrites....differentiated a lot, but not quite absent of
>chondritic characteristics like remnant chondrules. Their age signature is
>still from longggg ago.
>
>I agree (IMHO) with others to say that impact melting alone does not make
>an achondrite. It is primarily a function of differentiation.
>
>John
>
>
>-------------- Original message from "stan ." <laser_maniac_at_hotmail.com>:
>--------------
>
>
> >
> >
> > >
> > >Achondrites - (a-kon-drites) meteorites whose composition has been
> > >significantly altered from the early/primative chondritic material.
> > >Chondrules are not present.
> >
> > you cant say that because some achonderites contain chondrules - i have
>an
> > end cut of dhofar 125, an acapulcoite that has a chondrule or two
>visable
> >
> >
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Received on Wed 06 Apr 2005 04:52:18 PM PDT